They vapourise in the same way as the toolkit (Jack, wheelbrace etc.) plus more importantly the spare keys, handbooks and wheelnut keys do. I think people would remove the number plate to screw onto the garage wall for rememberance if they could.
Stupid selfish ****s.
It would be a different story if buyers said, right, that's two keys at £130 apiece, loadspace cover at £130, User manual at £30, jack at £50, I have to r3eplace them, so therefore drop the price by that amount to enable me to bring the car back to the condition it was supplied.
Syphoning the petrol out to leave a gallon in the tank and surrendering the tax is one thing but the squirrel culture is plain crazy and buyers still fall for it and when the car has been bought and the cost of the parts hits home, boy does it hurt !!!
I wonder how many of these "Stored" items have finished up in the dustbin or down the tip after a clear out of the garage junk.